6x-5y
7pq
原式=45a²b-2b²c
-810x
(2-66+3)(x-2y)=-61(x-2y)
合并同类项练习
合并同类项练习
(1)x-y+5x-4y (2)3pq+7pq-4pq+qp (3)30a²b+2b²c+15a²b-4b²c
(4)7xy-810x+5xy-12xy (5)2(x-2y)-66(x-2y)+3(x-2y)
(1)x-y+5x-4y (2)3pq+7pq-4pq+qp (3)30a²b+2b²c+15a²b-4b²c
(4)7xy-810x+5xy-12xy (5)2(x-2y)-66(x-2y)+3(x-2y)
数学人气:982 ℃时间:2020-04-27 13:10:39
优质解答
我来回答
类似推荐